package test3;

import java.util.concurrent.locks.ReentrantLock;

//测试Lock锁 : reentrantLock
public class TestLock {
    public static void main(String[] args) {
        TestLock2 testLock2 = new TestLock2();
        new Thread(testLock2).start();
        new Thread(testLock2).start();
        new Thread(testLock2).start();
        new Thread(testLock2).start();
    }
}

class TestLock2 implements Runnable {
    int ticketNums = 10;

    // 定义lock锁 reentrantLock
    private ReentrantLock lock = new ReentrantLock();

    @Override
    public void run() {
        while (true) {
            lock.lock();//加锁
            if (ticketNums > 0) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println(ticketNums--);
            } else {
                break;
            }
            lock.unlock();//解锁
        }
    }
}
